How does a relay valve work?
In a truck's air brake system, relay valves get a signal when a driver presses the treadle, which then opens the valve and allows air to enter the brake chamber via air inlet. The diaphragm gets pushed, then the rod, then the slack adjuster which twists to turn the brake camshaft.
Mounting |
4x M8 |
Opening pressure |
0.2 bar |
Port thread 1 |
M22 x 1.5 |
Port thread 2 |
2x M22 x 1.5 |
Port thread 3 |
JED-463 |
Port thread 4 |
M16 x 1.5 |
Pressure |
0.20 bar |
Regulating ratio: |
1: |
Temperature range |
-40°C to +80°C |
Version |
Pressure reduction |
Calculated Volume (dm³) |
1.132 |
Size (mm x mm x mm) |
101 x 101 x 111 |
Application: |
Daf,Mercedes,Man,Iveco,Volvo,Renault,Neoplan,Scania |